Ghostblade Eidolon 

Enchantment Creature — Spirit
Bestow {5}{W} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.)
Double strike (This creature deals both first-strike and regular combat damage.)
Enchanted creature gets +1/+1 and has double strike.
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Cards that do something similar expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Runes of the Deus 85%
$0.34#12362
"As long as enchanted creature is red, it gets +1/+1 and has double strike."
Silverblade Paladin 85%
$0.77#9674
"As long as this creature is paired with another creature, both creatures have double strike."